US8618308B2 - Process for the preparation of 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylates - Google Patents
Process for the preparation of 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylates Download PDFInfo
- Publication number
- US8618308B2 US8618308B2 US13/129,686 US200813129686A US8618308B2 US 8618308 B2 US8618308 B2 US 8618308B2 US 200813129686 A US200813129686 A US 200813129686A US 8618308 B2 US8618308 B2 US 8618308B2
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- United States
- Prior art keywords
- formula
- compound
- process according
- propyl
- imidazole
- Prior art date
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- Expired - Fee Related
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims description 18
- FREDNUVVPQMYKQ-UHFFFAOYSA-N 5-(2-hydroxypropan-2-yl)-2-propyl-1h-imidazole-4-carboxylic acid Chemical class CCCC1=NC(C(C)(C)O)=C(C(O)=O)N1 FREDNUVVPQMYKQ-UHFFFAOYSA-N 0.000 title abstract description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 150000001875 compounds Chemical class 0.000 claims description 49
- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 claims description 31
- 239000012535 impurity Substances 0.000 claims description 30
- 239000002904 solvent Substances 0.000 claims description 29
- 239000012044 organic layer Substances 0.000 claims description 19
- 239000010410 layer Substances 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 14
- 230000005494 condensation Effects 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 11
- 239000003960 organic solvent Substances 0.000 claims description 11
- 150000003839 salts Chemical class 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 8
- 230000032050 esterification Effects 0.000 claims description 8
- 238000005886 esterification reaction Methods 0.000 claims description 8
- 230000010933 acylation Effects 0.000 claims description 6
- 238000005917 acylation reaction Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- 238000005809 transesterification reaction Methods 0.000 claims description 6
- 230000003301 hydrolyzing effect Effects 0.000 claims description 5
- 125000004169 (C1-C6) alkyl group Chemical group 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 3
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 2
- 125000006273 (C1-C3) alkyl group Chemical group 0.000 claims 1
- GAZHKVLKWMTIIF-UHFFFAOYSA-N 4,4-dimethyl-2-propyl-1,6-dihydrofuro[3,4-d]imidazole Chemical compound C1OC(C)(C)C2=C1N=C(CCC)N2 GAZHKVLKWMTIIF-UHFFFAOYSA-N 0.000 abstract description 12
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 10
- 230000007062 hydrolysis Effects 0.000 abstract description 9
- 238000007142 ring opening reaction Methods 0.000 abstract description 6
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 63
- KZBJJAFGNMRRHN-UHFFFAOYSA-N ethyl 5-(2-hydroxypropan-2-yl)-2-propyl-1h-imidazole-4-carboxylate Chemical compound CCCC1=NC(C(=O)OCC)=C(C(C)(C)O)N1 KZBJJAFGNMRRHN-UHFFFAOYSA-N 0.000 description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 18
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical class [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 16
- 239000000047 product Substances 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- 239000002051 C09CA08 - Olmesartan medoxomil Substances 0.000 description 10
- UQGKUQLKSCSZGY-UHFFFAOYSA-N Olmesartan medoxomil Chemical compound C=1C=C(C=2C(=CC=CC=2)C2=NNN=N2)C=CC=1CN1C(CCC)=NC(C(C)(C)O)=C1C(=O)OCC=1OC(=O)OC=1C UQGKUQLKSCSZGY-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- 229960001199 olmesartan medoxomil Drugs 0.000 description 10
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000011541 reaction mixture Substances 0.000 description 7
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 7
- 235000017557 sodium bicarbonate Nutrition 0.000 description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 6
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 6
- 0 *O.*OC(=O)C1=C(C(C)(C)O)N=C(CCC)N1.*OC(=O)C1=C(C(C)(C)O)N=C(CCC)N1.CCCC1=NC2=C(N1)C(=O)OC2(C)C Chemical compound *O.*OC(=O)C1=C(C(C)(C)O)N=C(CCC)N1.*OC(=O)C1=C(C(C)(C)O)N=C(CCC)N1.CCCC1=NC2=C(N1)C(=O)OC2(C)C 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 5
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 5
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical group [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 150000002170 ethers Chemical class 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- NXPHGHWWQRMDIA-UHFFFAOYSA-M magnesium;carbanide;bromide Chemical compound [CH3-].[Mg+2].[Br-] NXPHGHWWQRMDIA-UHFFFAOYSA-M 0.000 description 4
- 150000007522 mineralic acids Chemical class 0.000 description 4
- -1 rare-earth metal salts Chemical class 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 150000008065 acid anhydrides Chemical class 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 150000005826 halohydrocarbons Chemical class 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
- AANKXJAIXXHHJB-UHFFFAOYSA-N C=C(C)C1=C(C(=O)O)NC(CCC)=N1.C=C(C)C1=C(C(=O)O)NC(CCC)=N1.CCCC1=NC(C(C)(C)O)=C(C(=O)O)N1.CCCC1=NC(C(C)(C)OC)=C(C(=O)O)N1.CCCC1=NC(C(C)(C)OC)=C(C(=O)O)N1.CCCC1=NC2=C(N1)C(=O)OC2(C)C Chemical compound C=C(C)C1=C(C(=O)O)NC(CCC)=N1.C=C(C)C1=C(C(=O)O)NC(CCC)=N1.CCCC1=NC(C(C)(C)O)=C(C(=O)O)N1.CCCC1=NC(C(C)(C)OC)=C(C(=O)O)N1.CCCC1=NC(C(C)(C)OC)=C(C(=O)O)N1.CCCC1=NC2=C(N1)C(=O)OC2(C)C AANKXJAIXXHHJB-UHFFFAOYSA-N 0.000 description 2
- SMEZZOQNFNELDS-UHFFFAOYSA-N C=C(C)C1=C(C(=O)O)NC(CCC)=N1.C=C(C)C1=C(C(=O)OCC)NC(CCC)=N1.CCCC1=NC(C(C)(C)O)=C(C(=O)O)N1.CCCC1=NC(C(C)(C)O)=C(C(=O)OCC)N1.CCCC1=NC(C(C)(C)OC)=C(C(=O)O)N1.CCCC1=NC(C(C)(C)OC)=C(C(=O)OCC)N1 Chemical compound C=C(C)C1=C(C(=O)O)NC(CCC)=N1.C=C(C)C1=C(C(=O)OCC)NC(CCC)=N1.CCCC1=NC(C(C)(C)O)=C(C(=O)O)N1.CCCC1=NC(C(C)(C)O)=C(C(=O)OCC)N1.CCCC1=NC(C(C)(C)OC)=C(C(=O)O)N1.CCCC1=NC(C(C)(C)OC)=C(C(=O)OCC)N1 SMEZZOQNFNELDS-UHFFFAOYSA-N 0.000 description 2
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- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 2
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 2
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- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 2
- 150000008041 alkali metal carbonates Chemical class 0.000 description 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
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- 239000003153 chemical reaction reagent Substances 0.000 description 2
- ZQPMIDPIXSMOAD-UHFFFAOYSA-N diethyl 2-propyl-1h-imidazole-4,5-dicarboxylate Chemical compound CCCC1=NC(C(=O)OCC)=C(C(=O)OCC)N1 ZQPMIDPIXSMOAD-UHFFFAOYSA-N 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- YVROBTFNZQRZEM-UHFFFAOYSA-N hexyl 5-(2-hydroxypropan-2-yl)-2-propyl-1h-imidazole-4-carboxylate Chemical compound CCCCCCOC(=O)C=1NC(CCC)=NC=1C(C)(C)O YVROBTFNZQRZEM-UHFFFAOYSA-N 0.000 description 2
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
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- 239000003456 ion exchange resin Substances 0.000 description 2
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- 150000002576 ketones Chemical class 0.000 description 2
- 150000002596 lactones Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VVFUTIWKSMGOEN-UHFFFAOYSA-N methyl 5-(2-hydroxypropan-2-yl)-2-propyl-1h-imidazole-4-carboxylate Chemical compound CCCC1=NC(C(C)(C)O)=C(C(=O)OC)N1 VVFUTIWKSMGOEN-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 150000003462 sulfoxides Chemical class 0.000 description 2
- 239000003930 superacid Substances 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- ITMCEJHCFYSIIV-UHFFFAOYSA-N triflic acid Chemical compound OS(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-N 0.000 description 2
- QAEDZJGFFMLHHQ-UHFFFAOYSA-N trifluoroacetic anhydride Chemical compound FC(F)(F)C(=O)OC(=O)C(F)(F)F QAEDZJGFFMLHHQ-UHFFFAOYSA-N 0.000 description 2
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
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- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 1
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- SUAKHGWARZSWIH-UHFFFAOYSA-N N,N‐diethylformamide Chemical compound CCN(CC)C=O SUAKHGWARZSWIH-UHFFFAOYSA-N 0.000 description 1
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- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical compound CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
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- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 150000007530 organic bases Chemical class 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 150000003222 pyridines Chemical class 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
- C07D233/66—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D233/90—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
- C07D491/02—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains two hetero rings
- C07D491/04—Ortho-condensed systems
- C07D491/044—Ortho-condensed systems with only one oxygen atom as ring hetero atom in the oxygen-containing ring
- C07D491/048—Ortho-condensed systems with only one oxygen atom as ring hetero atom in the oxygen-containing ring the oxygen-containing ring being five-membered
Definitions
- the present invention relates to the field of pharmaceutical synthesis, particularly, to the preparation of high purity 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylate.
- Ethyl 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylate (formula V) is a key intermediate for the synthesis of olmesartan medoxomil, which can be produced via the reaction of diethyl 2-propyl-imidazole-4,5-dicarboxylate, the raw material, with methylmagnesium bromide, followed by the acidification with saturated ammonium chloride solution (J. Med. Chem. 1996, 39, 323-338).
- hydroxyl methylated product of olmesartan medoxomil (impurity 1)
- hydroxyl eliminated product of olmesartan medoxomil (impurities 2) are the two major impurities in the olmesartan medoxomil as reported by Hedvati Lilach in US2006258727 on Nov. 16, 2006.
- One object of the present invention is to provide a process to obtain 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylate (formula I).
- Another object of the present invention is to provide a process to obtain high purity 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylate (formula I).
- the present invention provides a process for the preparation of compound of formula I, comprising mixing the compound of formula II, or its hydrolysis product, or its ring-opening product, with alcohol R—OH to produce compound of formula I,
- R is selected from C 1 -C 6 alkyl.
- the hydrolysis product or ring-opening product is selected from a compound of formula III.
- the catalyst is a catalyst for transesterification or a condensation agent for oxygen acylation.
- reaction temperature is in the range of ⁇ 20° C. to the reflux temperature of the alcohol R—OH.
- reaction time is between 30 minutes and 72 hours.
- R is selected from C 1 to C 3 alkyl.
- the compound of formula III is generated by
- the present invention provides a process to obtain compound of formula I at high purity, comprising the following steps prior to the aforementioned step for producing compound of formula I:
- M represents a group which can form water-soluble salt with carboxyl group, preferably alkali metal.
- step (3) is followed by the following steps:
- the extraction or washing are performed 1-3 times.
- step (3) is followed by the following steps: drying, filtration of the organic layer, distillation to remove the solvent, and recrystallization, to obtain compound of formula II.
- said organic solvent can be selected from hydrocarbons, halohydrocarbons, ethers, and esters with no particular requirement providing that compound of formula II can be dissolved in the solvent and aqueous layer can be separated.
- said condensation agent used in step (2) includes condensation agents capable of catalyzing esterifications or oxygen acylations, or dehydrants for esterifications.
- said step (2) is performed at reaction temperature in the range of ⁇ 20 to 100° C., reaction time in the range of 1 to 56 hours.
- the present invention provides a novel and more effective process for the preparation of ethyl 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylate (formula V), the provided process can further produce ethyl 4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate (formula V) at high purity so that high purity olmesartan medoxomil can be obtained.
- compound of formula I can be produced by the reaction of compound of formula II, or its hydrolysis product, or its ring-opening product, with alcohol under appropriate catalytic conditions.
- the raw material, compound of formula V, is hydrolyzed into compound of formula III, which is converted to compound of formula II via intramolecular cyclization, while impurities 3 and/or 4 in compound of formula V will be hydrolyzed into impurities 5 and/or 6; once the lactone compound of formula II is produced via the intramolecular cyclization of compound of formula III, the compound of formula II containing impurities 5 and/or 6 is dissolved in organic solvents (such as ethyl acetate), and washed with alkaline aqueous solution (such as saturated sodium bicarbonate solution) in order to remove impurities 5 and/or 6, and to obtain high purity compound of formula II, therefore, compound of formula I is produced at high purity.
- organic solvents such as ethyl acetate
- alkaline aqueous solution such as saturated sodium bicarbonate solution
- R is selected from C 1 -C 6 alkyl.
- compound of formula I is 4-(1-hydroxy-1-methylethyl)-2-propylimidazole-5-carboxylate
- compound of formula II is 4,4-dimethyl-2-propyl-4,6-dihydrofuro[3,4-d]imidazole
- compound of formula III is 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylic acid
- compound of formula IV is diethyl 2-propylimidazole-4,5-dicarboxylate
- compound of formula V is ethyl 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylate.
- the process according to the present invention is mixing compound of formula II, or its hydrolysis product, or its ring-opening product with alcohol R—OH to produce compound of formula I.
- compound of formula II is hydrolyzed into compound of formula III, which is then mixed with alcohol R—OH to produce compound of formula I.
- the catalyst for transesterification providing that it is capable of catalyzing transesterification, it can be inorganic acid selected from hydrochloric acid, hydrogen chloride gas, sulfuric acid, phosphoric acid, hydrobromic acid, hydrogen bromide gas, hydroiodic acid; and organic acid selected from trifluoromethanesulfonic acid, p-toluenesulfonic acid, rare-earth metal salts of trifluorosulfonic acid, strong acid ion exchange resin, and super acid.
- inorganic acid selected from hydrochloric acid, hydrogen chloride gas, sulfuric acid, phosphoric acid, hydrobromic acid, hydrogen bromide gas, hydroiodic acid
- organic acid selected from trifluoromethanesulfonic acid, p-toluenesulfonic acid, rare-earth metal salts of trifluorosulfonic acid, strong acid ion exchange resin, and super acid.
- the hydrolysis catalyst according to the present invention for hydrolyzing compound of formula II into compound of formula III is well known in the art. Any catalyst capable of catalyzing the hydrolysis reaction, such as alkali metal hydroxide: lithium hydroxide, sodium hydroxide or potassium hydroxide, can be used.
- the esterification of compound of formula III in alcohol (R—OH) for producing compound of formula II according to the present invention can use catalyst well-known in the art.
- Catalysts for esterification or condensation agents for oxygen acylation are all applicable for catalyzing this reaction, for example, inorganic acid selected from hydrochloric acid, hydrogen chloride gas, sulfuric acid, phosphoric acid, hydrobromic acid, hydrogen bromide gas, hydroiodic acid, and organic acid selected from trifluoromethanesulfonic acid, p-toluenesulfonic acid, rare-earth metal salts of trifluorosulfonic acid, strong acid ion exchange resin, super acid, and thionyl chloride.
- the reaction temperature is between ⁇ 20° C. to reflux temperature of the solvent, preferably between room temperature to reflux temperature of the solvent; reaction time allows the reaction to complete, which is generally between 30 minutes to 72 hours, preferably between 30 minutes to 48 hours.
- R of the alcohol (R—OH) is selected from C 1 -C 6 alkyl, preferably ethanol.
- compound of formula II without or with little impurities 5 and/or 6 can be obtained and subjected to transesterification reaction with alcohol (R—OH) to produce compound of formula I, or compound of formula II can be hydrolyzed into compound of formula III, which is then esterified in alcohol (R—OH) to produce compound of formula I.
- the compound of formula I is produced with little impurities.
- ethyl 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylate is produced by transesterification reaction in ethanol, or compound of formula III produced by hydrolysis of compound of formula II is esterified in ethanol to produce ethyl 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazole-5-carboxylate (formula V).
- formula V olmesartan medoxomil with low impurity content can be produced by subsequent reaction and simple purification.
- Salt of impurity 5 or salt of impurity 6 can also be reutilized by techniques well known in the art.
- the process of preparation comprises the following steps:
- reaction condition for step (1) can be routinely determined in the art, for example, the reaction with methylmagnesium bromide can be conducted in ether solvent, then the reactant can be acidified and the product can be extracted.
- the hydrolysis in step (2) can be customary in the art providing that the ester hydrolysis can be accomplished.
- sodium hydroxide solution is added into dissolved compound of formula V and the mixture is refluxed and hydrolyzed.
- Step (3) is generally conducted in organic solvent.
- Conventional solvent in the art can be used provided that there is no adverse effect on the reaction or the reagents used, and the reactant can be dissolved or dissolved to some extent in the solvent.
- Suitable solvents include, but not limited to, hydrocarbons, ethers, ketones, sulfoxides, amides, pyridines or cyanides.
- Suitable hydrocarbons include, but not limited to, alkanes, halohydrocarbons, benzene, toluene or xylene.
- Suitable ethers include, but not limited to, ethyl ether, propyl ether, tetrahydrofuran or dioxane.
- Suitable ketones include, but not limited to, acetone or methyl ethyl ketone.
- Suitable sulfoxides include, but not limited to, dimethyl sulfoxide.
- Suitable amides include, but not limited to, N,N-dimethylformamide, N,N-diethyl formamide or N,N-dimethylacetamide.
- the condensation agent used in step (3) can be any customary condensation agent in the art which is capable of catalyzing esterification or oxygen acylation. Dehydrants for esterification may be used as well.
- the 5-carboxyl can form active ester or acid anhydride prior to the condensation with the hydroxyl in the 1-hydroxy-1-methylethyl on position 4 to form lactone.
- Preferred reagents include inorganic acids, carbodiimides, acids and acid anhydrides or thionyl chloride.
- Suitable inorganic acids include, but not limited to, hydrochloric acid, hydrobromic acid, sulfuric acid or phosphoric acid.
- Suitable carbodiimides include, but not limited to, dicyclohexylcarbodiimide.
- Suitable acids and acid anhydrides include, but not limited to, trifluoroacetic acid or trifluoroacetic anhydride.
- Step (3) imposes no particular limitation on reaction temperature, which is generally in the range of ⁇ 20 to 100° C., preferably 0 to 50° C. Reaction time will depend on the solvent and reaction temperature; usually it is in the range of 1 to 56 hours.
- the organic solvent in step (4) can be selected from hydrocarbons, preferably toluene, para-xylene; halohydrocarbons, preferably dichloromethane, 1,2-dichloroethane, chloroform; ethers, preferably isopropyl ether, tetrahydrofuran, dioxane, methyl tert-ether; and esters, preferably ethyl acetate, butyl acetate.
- hydrocarbons preferably toluene, para-xylene
- halohydrocarbons preferably dichloromethane, 1,2-dichloroethane, chloroform
- ethers preferably isopropyl ether, tetrahydrofuran, dioxane, methyl tert-ether
- esters preferably ethyl acetate, butyl acetate.
- the alkaline aqueous solution in step (4) can be routine alkaline aqueous solution in the art, suitable alkali include, but not limited to, alkali metal hydroxides, alkali metal carbonates, alkali metal bicarbonates and organic bases, preferably alkali metal bicarbonates, and alkali metal carbonates. There is no particular limitation on concentration of alkaline aqueous solution, saturated solution is preferred.
- step (4) is thorough mixing of compound of formula II with organic solvents so that the compound is completely dissolved, followed by fully mixing with the alkaline aqueous solution and separating the organic layer.
- the aqueous layer is further extracted for 1-5 times, 1-3 times preferred, with organic solvent, all the organic layers are then combined and washed with saturated saline solution for 1-5 times, 1-3 times preferred.
- the present invention provides a simple and cost-effective process for the preparation of compound of formula I;
- DCC dicyclohexylcarbodiimide
Abstract
Description
Claims (12)
Applications Claiming Priority (1)
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PCT/CN2008/073081 WO2010054515A1 (en) | 2008-11-17 | 2008-11-17 | Process for the preparation of 4-(1-hydroxy-1-methylethyl)- 2-propyl-imidazole-5-carboxylates |
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US20120095237A1 US20120095237A1 (en) | 2012-04-19 |
US8618308B2 true US8618308B2 (en) | 2013-12-31 |
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US (1) | US8618308B2 (en) |
EP (1) | EP2374799B1 (en) |
JP (1) | JP5395908B2 (en) |
WO (1) | WO2010054515A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012154745A2 (en) | 2011-05-09 | 2012-11-15 | Advanced Liquid Logic, Inc. | Microfluidic feedback using impedance detection |
WO2012154794A2 (en) | 2011-05-10 | 2012-11-15 | Advanced Liquid Logic, Inc. | Enzyme concentration and assays |
EP2672260A1 (en) | 2008-05-13 | 2013-12-11 | Advanced Liquid Logic, Inc. | Droplet actuator devices, systems and methods |
EP2719449A1 (en) | 2011-05-02 | 2014-04-16 | Advanced Liquid Logic, Inc. | Molecular diagnostics platform that uses digital microfluidics and multiplexed bead detection |
WO2015031849A1 (en) | 2013-08-30 | 2015-03-05 | Illumina, Inc. | Manipulation of droplets on hydrophilic or variegated-hydrophilic surfaces |
EP3072968A1 (en) | 2010-02-25 | 2016-09-28 | Advanced Liquid Logic, Inc. | Method of making nucleic acid libraries |
EP3193180A1 (en) | 2010-11-17 | 2017-07-19 | Advanced Liquid Logic, Inc. | Capacitance detection in a droplet actuator |
WO2017176896A1 (en) | 2016-04-07 | 2017-10-12 | Illumina, Inc. | Methods and systems for construction of normalized nucleic acid libraries |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104402873A (en) * | 2014-12-02 | 2015-03-11 | 千辉药业(安徽)有限责任公司 | Preparation method of olmesartan medoxomil intermediate |
CN114950318A (en) * | 2022-05-30 | 2022-08-30 | 浙江华洋药业有限公司 | Production process of imidazole monoester |
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US20060258727A1 (en) | 2005-01-03 | 2006-11-16 | Lilach Hedvati | Olmesartan medoxomil with reduced levels of impurities |
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CN1271068C (en) * | 2003-03-25 | 2006-08-23 | 上海医药工业研究院 | Novel method for preparing olmesartan |
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2008
- 2008-11-17 JP JP2011535852A patent/JP5395908B2/en not_active Expired - Fee Related
- 2008-11-17 EP EP08878075.4A patent/EP2374799B1/en not_active Not-in-force
- 2008-11-17 WO PCT/CN2008/073081 patent/WO2010054515A1/en active Application Filing
- 2008-11-17 US US13/129,686 patent/US8618308B2/en not_active Expired - Fee Related
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Cited By (10)
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EP2672260A1 (en) | 2008-05-13 | 2013-12-11 | Advanced Liquid Logic, Inc. | Droplet actuator devices, systems and methods |
EP2672259A1 (en) | 2008-05-13 | 2013-12-11 | Advanced Liquid Logic, Inc. | Droplet actuator devices, systems and methods |
EP3072968A1 (en) | 2010-02-25 | 2016-09-28 | Advanced Liquid Logic, Inc. | Method of making nucleic acid libraries |
EP3193180A1 (en) | 2010-11-17 | 2017-07-19 | Advanced Liquid Logic, Inc. | Capacitance detection in a droplet actuator |
EP2719449A1 (en) | 2011-05-02 | 2014-04-16 | Advanced Liquid Logic, Inc. | Molecular diagnostics platform that uses digital microfluidics and multiplexed bead detection |
WO2012154745A2 (en) | 2011-05-09 | 2012-11-15 | Advanced Liquid Logic, Inc. | Microfluidic feedback using impedance detection |
EP2711079A2 (en) | 2011-05-09 | 2014-03-26 | Advanced Liquid Logic, Inc. | Microfluidic Feedback Using Impedance Detection |
WO2012154794A2 (en) | 2011-05-10 | 2012-11-15 | Advanced Liquid Logic, Inc. | Enzyme concentration and assays |
WO2015031849A1 (en) | 2013-08-30 | 2015-03-05 | Illumina, Inc. | Manipulation of droplets on hydrophilic or variegated-hydrophilic surfaces |
WO2017176896A1 (en) | 2016-04-07 | 2017-10-12 | Illumina, Inc. | Methods and systems for construction of normalized nucleic acid libraries |
Also Published As
Publication number | Publication date |
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JP5395908B2 (en) | 2014-01-22 |
EP2374799A4 (en) | 2012-06-27 |
JP2012508695A (en) | 2012-04-12 |
US20120095237A1 (en) | 2012-04-19 |
EP2374799B1 (en) | 2013-05-22 |
EP2374799A1 (en) | 2011-10-12 |
WO2010054515A1 (en) | 2010-05-20 |
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